<!DOCTYPE html>
<html lang="en">
<frameset cols="120,*">
  <frame src="/Day01/example/content.html">
    <frame src="/Day01/example/d.html" id="C4">
</frameset>
<head>
    <meta charset="UTF-8">
    <title>导航框架</title>
</head>
<body>

</body>
</html>